Check valve



J. L. GIBSON CHECK VALVE Filed Dec. 16, 1925 mid N701? JZAnIQJson it ATTORNEY Patented Sept. 11 1928 UNITED srarr s JOHN I1. GIBSON, OFBROOKLYN, NEW YORK.

CHECK VALVE.

Application filed December 16, 1925. Serial No. 75,768.

This invention relates to improvements in check valves for automaticallycontrolling the flow of liquids from a pump, the latter acting at eachpulsation to forcibly discharge the liquid through a passage, therebylifting the valve off its seat, and permitting the returnthereof bygravity to prevent back-flow of the liquid. Y

The objects of the present inventionare to provide means for controllingthe terminal opening and closing movements of the valve and to cause inconnection therewith a slight intermittent rotation of the valve toprevent excessive wear on the engaging parts.

For further comprehension of the invention, and of the objects andadvantages thereof, reference is had to the following description andaccompanying drawing, and to the appended claims in which the variousfeatures of the invention are more particularly pointed out.

In the drawing, Figure 1 shows a sectional view of the valve body withits valve positioned somewhat above its seat and constructed inaccordance with the present invention. Figure 2 is a view showing thebottom of the valve.

Numeral 10 of the drawing represents a valve body of ordinaryconstruction having the side connection flanges 11 and the detachableyoke 12, the latter being formed with a stuffing box 13 provided with agland 14 engaging the adjustable stop-rod 15.

The valve body is provided with a discharge passage 16 having at itsupper end a seat 17 of the usual type and adapted to be engaged by thevalve face 18 of the valve 19. Projecting from the valve face are aseries of guiding fins 20 which slidably engage the valve passage 16,and at its opposite or upper end the valve is provided with astop'member 21 arranged to engage a corresponding stop member 21 on thestop-rod 15, the latter having a projecting stem 22 which slidablyengages as a guide the side walls of a perforation formed in the upperend of the valve, a vent hole 22 being provided through the wall of theperforation to permit the escape of liquid collecting below the stem 22of the stop-rod. At its-upper end the stop-rod 15 is provided with athreaded portion 23, engaging a correspondingly threaded perforation inthe yoke 12, a squared portion 24 at the extreme outer endof thestop-rodprovides means for rotating said rod by the use Recesses orpockets 25 are formed in the valve face 18, the same beingconcentrically disposed therewith and lengthwise elongated with respectto said face, and provided with inwardly inclined bottom walls 26extending from the face of the valve to the vertical end wall 26, thedeeper portion of the pockets being indicated by the more heavily shadedlines shown in Fig. 2. These pockets are disposed immediatcly oppositethe seat 17 of the valvebody, and when the valve is seated the pocketstherein form closed chambers having inclined bottom walls or vanes.

As the liquid under pressure flows through the passage 16 and raisesthe'valve, it continues its flow between the valve face and seat andenters the several pockets,.engaging the inclined bottom walls or vanesthereof and by reaction thereon tends to rotate said valve about itsaxis, the extent of rotation depend ing upon the pressure of the flow ofliquid. Also, as the pressure of the liquid between the valve face andseat diminishes under the reduced pulsating action of the pump and thevalve falls against its seat by gravity, its terminal movement ischecked or cushioned by the resistance offered to the escape of theliquid from the pockets, the air normally contained in the liquidtogether with that trapped within the pockets serving additi0n ally toincrease the cushioning effect at this point.

As the pockets are closed by the closing action of the valve, it will beclear that when the valve is seated it will receive no rotating ordisturbing efllect from the pockets, the latter operating only when thevalve begins and retains its open position with respect to its seat.

At the termination of the upward movement of the valve, the stop members21 and 21 are cushioned with respect to each other by the action of thegroove 27 formed in the upper of said members, the said action inconnection with the entrapped air and water being similar to thatdescribed for the pockets within the valve face.

What I claim as my invention and desire to secure by Letters Patent, is:V

1. In a check valve, a valve seat having a discharge passage, a valvemovable with respect to said seat and having a face adapted to engagethe latter and close said passage,

and one or more pockets formed in said valve face 111 opposite relationto said seat and adapted to be closed thereby, the said pockets having abottom wall inwardly inclined from the face of said valve. v a 2. In acheck valve, a valve body provided with a discharge passage, a valveseat surrounding said passage, a valve movable with respect to said seatand having a face adapted to engage the latter and close said passage,and one or more pockets formed in said valve face in opposite relationto said seat, the said pockets having a bottom Wall inwardly inclinedfrom the face of said valve and adapted to be closed with the closing ofsaid passage. 3. In acheck valve, a valve body provided with a dischargepassage, a valve seat surpassage, a stop member formed on valve face inopposite relation to said seat the said pocketsphaving I bottom Wall in-25 Wardly inclined from the face of Said valve and adapted to be closedwith the closing of said assages 4. n a check valve, a valve bodyprovided with a discharge passage, a valve seat sur- 30 rounding saidpassage, a valve movable with respect to said seat and having a faceadapted to engage the latter and close said passa e, one or more pocketsioimedi n said va ve face in opposite relatiori a: said the said 3:

pockets being closed with the closing of said a second stop memberoppesitely diagram: with respect to said first mentioned stop them herandadaipted toengage Hthesarae, and a" 40 groove arranged in the face ofone of said step member-a In testi ony whereoi, he hm si ned his name tothis specification this 15th day of December, 1925 JOHN D; GIBSON;

